Our 3-inch chlorine tablets have a perfect balance of 90% stabilized chlorine and 99% active ingredients to stop bacteria and algae growth in its tracks. Plus, they stabilize against the sun's destructive UV rays to prevent swimming pool chlorine burn-off. The chlorine is locked in the pool water so you use less swimming pool chemicals, which saves you money. Each chlorine tab is slow dissolving and individually wrapped for easy handling. All of our swimming pool chlorine tabs contain the same formula as many of our competitors. However, you will spend up to 50% less with Doheny's fresh, pure, uncontaminated pool chlorine tabs.